Groups comparison
Covox Speech Thing SPU - 1988 to 1996
An extremely primitive & cheap dongle that plugged into a parallel port to provide 8-bit DAC digital sound output that was superior to the PC speaker.
Intersound MDO SPU - 1989 to 1991
An improved and non-compatible clone of the Covox Speech Thing.
Disney Sound Source - 1990 to 1996
An improved and not exactly compatible clone of the Covox Speech Thing packaged with an external speaker.
An extremely primitive & cheap dongle that plugged into a parallel port to provide 8-bit DAC digital sound output that was superior to the PC speaker.
Intersound MDO SPU - 1989 to 1991
An improved and non-compatible clone of the Covox Speech Thing.
Disney Sound Source - 1990 to 1996
An improved and not exactly compatible clone of the Covox Speech Thing packaged with an external speaker.
spu-cst
spu-imdo
spu-dss